Police are searching for a suspect in the slaying of a Michigan teen who was killed while walking her dog.

April Millsap, a 14-year-old from Armada, Michigan, went missing Thursday evening after texting her boyfriend, "Omg. … I think I'm being kidnapped," Michigan Live reports.

She was found hours later after her family's border collie led two people jogging on the Macomb Orchard Trail to her body, according to the Detroit Free Press.

"She was such a beautiful child," her grandmother Jackie Levans told the newspaper, crying. "She did not deserve to die like this. Please tell people don't think it cannot happen to you. We would never have expected something like this to happen to us. They ruined somebody's life."

During a news conference Tuesday, authorities said they are "zeroing in" on the person responsible for April's death, adding that neither her family nor her boyfriend are being considered as suspects, according to the Macomb Daily.

Investigators initially looked for a grey van possibly linked to the crime but have since ruled that lead out, now focusing on a motorcycle rumored to have been spotted on the scene, reports WXYZ-TV, the area's ABC affiliate. Police have also released a sketch of a person of interest with "sandy brown or reddish hair."